1,2

Also numbers n such that (22*10^n+17)/3 is prime.

Makoto Kamada, Factorizations of 733...339.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(22*10^n + 17)/3], Print[n]], {n, 0, 10000}]

Sequence in context: A041653 A041125 A042257 this_sequence A041445 A041961 A058854

Adjacent sequences: A103053 A103054 A103055 this_sequence A103057 A103058 A103059

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 19 2005